1 files changed, 58 insertions, 0 deletions
diff --git a/test/ruby/test_variable.rb b/test/ruby/test_variable.rb
new file mode 100644
index 0000000000..c4a17b7caf
--- /dev/null
+++ b/test/ruby/test_variable.rb
@@ -0,0 +1,58 @@
+require 'test/unit'
+
+$KCODE = 'none'
+
+class TestVariable < Test::Unit::TestCase
+  class Gods
+    @@rule = "Uranus"
+    def ruler0
+      @@rule
+    end
+
+    def self.ruler1		# <= per method definition style
+      @@rule
+    end		   
+    class << self			# <= multiple method definition style
+      def ruler2
+	@@rule
+      end
+    end
+  end
+
+  module Olympians
+    @@rule ="Zeus"
+    def ruler3
+      @@rule
+    end
+  end
+
+  class Titans < Gods
+    @@rule = "Cronus"
+    include Olympians           	# OK to cause warning (intentional)
+  end
+
+  def test_variable
+    assert($$.instance_of?(Fixnum))
+    
+    # read-only variable
+    begin
+      $$ = 5
+      assert false
+    rescue NameError
+      assert true
+    end
+    
+    foobar = "foobar"
+    $_ = foobar
+    assert($_ == foobar)
+
+    assert(Gods.new.ruler0 == "Cronus")
+    assert(Gods.ruler1 == "Cronus")
+    assert(Gods.ruler2 == "Cronus")
+    assert(Titans.ruler1 == "Cronus")
+    assert(Titans.ruler2 == "Cronus")
+    atlas = Titans.new
+    assert(atlas.ruler0 == "Cronus")
+    assert(atlas.ruler3 == "Zeus")
+  end
+end